The nackCount property of the RTCRtpStreamStats dictionary is a numeric value indicating the number of times the receiver sent a NACK packet to the sender. A NACK (Negative ACKnowledgement, also called "Generic NACK") packet tells the sender that one or more of the RTP packets it sent were lost in transport.
Syntax
var nackCount = RTCRtpStreamStats.nackCount;
Value
An integer value indicating how many times the receiver sent a NACK packet to the sender after detecting that one or more packets were lost during transport.
Note: This value is only available on the receiver.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Identifiers for WebRTC's Statistics API The definition of 'RTCRtpStreamStats.nackCount' in that specification. |
Candidate Recommendation | Initial definition. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
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| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
nackCount | Chrome No support No | Edge ? | Firefox Full support 55 | IE No support No | Opera No support No | Safari ? | WebView Android No support No | Chrome Android No support No | Edge Mobile ? | Firefox Android Full support 55 | Opera Android No support No | Safari iOS ? | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
Document Tags and Contributors
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